[OpenAFS] Odd question: KeyFile vs keytab

[Jeffrey Altman]

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John Rudd wrote:
> 
> So, we have KeyFiles on our old Transarc AFS DB servers.  We don't have
> keytabs to match those KeyFiles.
> 
> 
> a) will the Transarc KeyFiles work directly on OpenAFS DB servers?  (no
> need to change the KeyFiles nor KDC stored principles, just copy the
> KeyFiles over?)  My doubt here is that the KeyFiles are Transarc based,
> and thus krb4 based ... whereas my expectation is that the OpenAFS
> KeyFiles are krb5 based...

The KeyFile format has not changed.  They store a single DES key.
A DES key is a DES key regardless of whether it is used with Kerberos 4
or Kerberos 5.

The Transarc files do not need to be updated as part of a transition
from Transarc to OpenAFS.

> b) is there a way to reverse the asetkey operation, effectively creating
> a keytab from a KeyFile?  And then I could use ktutil to convert it to a
> krb5 keytab, and then run the OpenAFS version of asetkey?

asetkey takes a Kerberos 5 key and stores it in the AFS KeyFile.

Jeffrey Altman


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